Kerly Sinister Strings are nickel wound, heavy-gauge strings seasoned between -320F and plus 350F for 24 hours to reduce the micro-cracks that cause tonal loss and premature breakage. Thanks to the repetitive HOT/COLD tempering process, the micro-cracks close up, preventing the buildup of dirt and corrosion. Strength, sound, and string life are enhanced. Set of 6 medium-gauge guitar strings.

I recently bought these strings after using-and being disappointed with-just about every string maker out there. There was always something that just wasn't right. Too stiff, to loose, no highs, no lows, there was always something missing. I've seen these strings a hundred times and though why spend more money on another kind of string that I'll just be let down by... Well I was wrong!! These are the strings I will by from now on. They are amazing. I've played nine shows and countless jam sessions and lessons with my students on the same set of strings and they STILL SOUND GOOD!! I changed them tonight for the first time since August. They maintain a great tone and stay in tune, even in the elements. I can't say it enough. I LOVE THESE STRINGS!